Two steps

Using different fonts is much easier than I thought. It involves two steps:

  1. Change the Compiler from LaTex or pdfLatex to either XeLaTex or LuaLaTex. To make this change, click the Menu button on the upper-left corner of your Overleaf project. In Settings, you’ll see a drop list in Compiler.

  2. Add these two lines:

\usepackage{fontspec}
\s …